KEYSTONE HIGH INCOME BOND FUND B-4
N-30D, 1996-09-26
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PAGE 1
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Keystone High Income Bond Fund (B-4)
Seeks generous income primarily from high yield corporate bonds.

Dear Shareholder:

We are writing to report to you on the performance of Keystone High Income Bond
Fund (B-4) for the twelve-month period which ended July 31, 1996.

Performance

Your Fund produced a total return of 2.19% for the six-month period and 1.38%
for the twelve-month period which both ended July 31, 1996. The Lehman Aggregate
Bond Index--a broad index of U.S. corporate, government and mortgage
securities--returned -1.61% for the six-month period and 5.53% for the
twelve-month period.

  We were not satisfied with your Fund's one year performance. However, we
believe we have seen signs of improvement in 1996 as the portfolio has been
restructured. The past year represented a period of transition as Richard Cryan
assumed responsibility as portfolio manager at the beginning of 1996. Our
primary objective has been to restructure and upgrade the Fund's portfolio and
increase diversification and liquidity. We believe this long-term strategy has
laid the foundation for stronger and more consistent performance. Mr. Cryan
discusses this strategy in more detail beginning on page three.

Market environment

Market conditions were favorable for high yield bond investors, especially over
the past six months. Strong economic growth in the first half of 1996 was
positive for many companies that had issued high yield bonds. High yield bonds
also benefitted in the first half of the period from the bond market rally.
Investors were attracted to the high income of high yield bonds in the lower
interest rate environment. In the second half of the period, strong cash flow
and investor demand provided some support to high yield bond prices. This was
during a time when prices in the overall fixed-income markets declined. Though
the prices of high yield bonds declined in 1996, they held their value better
than any other sector of the fixed-income market.

  Although your Fund continued to pay a competitive dividend, it was necessary
to reduce the Fund's dividend in October 1995 and June 1996. There were two
reasons for these reductions: declines in market rates in 1995 and early 1996,
and our emphasis on higher quality bonds. Throughout most of 1995 interest rates
declined, lowering yields to nearly every bond investor. In this environment,
many investors attempted to reach for higher yields by investing in lower rated
bonds. In the interest of long-term performance, we chose not to downgrade
quality and continued to upgrade the portfolio. These higher quality bonds tend
to have lower yields, but have historically provided better price stability in a
slower economic environment.

Our outlook

We believe that the stronger economic growth environment of the first half will
moderate for the remainder of the year. Combined with well contained inflation,
long-term bonds should remain in a trading range. This should provide a
satisfactory environment for high yield bonds. We believe your Fund is well
positioned for this environment, with its emphasis on higher quality, high yield
bonds and broad diversification.
  We are pleased to inform you that Keystone has agreed to be acquired by First
Union Corporation. The acquisition is subject to a number of conditions,
including approvals of investment advisory agreements with Keystone by fund
shareholders. First Union is a financial services firm based in Charlotte, North
Carolina. It is the nation's

                                                                   -continued-

<PAGE>

PAGE 2
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Keystone High Income Bond Fund (B-4)

sixth largest bank holding company with assets of approximately $140 billion.
First Union, through its wholly-owned subsidiary Evergreen Asset Management
Corp., manages more than $16 billion in 36 mutual funds. Keystone will remain a
separate entity after its acquisition and will continue to provide investment
advisory and management services to the Fund. We believe First Union's
acquisition of Keystone should strengthen the investment management services we
provide to you.

Thank you for your continued support of Keystone High Income Bond Fund (B-4). We
encourage you to write to us with questions or comments about your investment.

Sincerely,

/s/ Albert H. Elfner, III
Albert H. Elfner, III
Chairman and President
Keystone Investments, Inc.

/s/ George S. Bissell
George S. Bissell
Chairman of the Board
Keystone Funds

September 1996

[PHOTO: Albert H. Elfner, III]

[PHOTO: George S. Bissell]

[DALBAR HONORS COMMITMENT TO LOGO]

Dalbar Key Honors

Honoring Commitment to Excellence

Keystone was recently recognized by Dalbar, an independent mutual fund rating
organization, for demonstrating a commitment to serving the needs of customers.
The award is intended to distinguish companies who are committed to investors
and have a proven ability to provide good service.

Keystone Introduces Investment Insight Line for Shareholders

Now you can keep up-to-date on your fund's current strategy and outlook by
calling Keystone Investment Insight Line. You can hear Keystone portfolio
managers discuss their latest strategies, or listen to Keystone's overall market
outlook from James McCall, chief investment officer. Of course, your financial
adviser can provide you with more complete information on Keystone Funds. This
service is available 24 hours a day, seven days a week and updated at least
monthly.

Keystone Investment Insight Line 1-800-346-3858, Press 2 after the greeting

<PAGE>

PAGE 3
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A Discussion With
Your Fund's Manager

[PHOTO OF RICHARD CRYAN]

 Richard Cryan is portfolio manager of the Fund and heads Keystone's high yield
bond team. Mr. Cryan has more than 16 years of investment experience, and served
  as president of Wasserstein Perella Asset Management and also as a portfolio
  manager at Fidelity Investments. Dick received his BS from the University of
  Colorado and his MBA from Columbia University. Mr. Cryan's team researches,
             analyzes and evaluates high yield bonds for the Fund.

Q Tell us about the strategy change you implemented in Keystone High Income Bond
Fund (B-4) at the beginning of 1996.

A We attempted to generate more consistent performance and attractive income by
upgrading the portfolio's credit quality and increasing diversification and
liquidity. These were significant changes that were made over the last six
months, taking market conditions and the potential long-term benefits into
consideration.

Q Please describe the changes you made to the portfolio.

A We upgraded quality by raising the percentage of net assets invested in BB
rated bonds. The BB rating is the strongest credit rating available in the high
yield sector. As of July 31, 1996, over one-third of net assets were invested in
BB rated securities, compared to less than a quarter of net assets last year at
this time (see pie charts on page four). To build diversification, we increased
the number of bonds in the portfolio and reduced positions which comprised more
than 1% of assets. We increased liquidity by selling many of the smaller issues
and reinvesting in bond issues with market capitalizations of greater than $100
million. Finally, we eliminated equity positions that had been related to older
bond issues. We reinvested the proceeds in higher yielding, income-producing
securities.

Q How have these changes affected performance?

A While we were only six months into the new strategy at the end of the period,
we believe we have begun to see some promising signs. As of July 31, the Fund's
price volatility has been reduced by one-third since the beginning of the year.
Further, the portfolio has kept pace with its peers through much of 1996. While
we were pleased with these short-term results, we realize that a record of
long-term, consistent performance can take time to build. We intend to continue
to work hard toward this goal every day.

Q What was the environment like for high yield bonds over the past twelve
months?

A The environment was favorable, although investors dealt with two different
interest rate climates. Last year was favorable for fixed-income securities
in general. Slow economic growth and low inflation drove interest rates close
to historically low levels. High

Fund Profile

Objective: Seeks generous income primarily from high yield corporate bonds.
Commencement of investment operations: September 11, 1935
Number of bonds: 140
Net assets: $594 million
Newspaper listing: "HiIncB4"

<PAGE>

PAGE 4
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Keystone High Income Bond Fund (B-4)

Portfolio Quality Summary (July 31, 1995)(1)

[PIE CHART 1]

B (47%)
BB (23%)
Other(2) (16%)
Not rated (13%)
CCC or lower (1%)

(percentage of portfolio assets)

Portfolio Quality Summary (July 31, 1996)

[PIE CHART 2]

B (51%)
BB (37%)
BBB (2%)
Other(2) (6%)
Not rated (3%)
CCC or lower (1%)

1 Where Standard & Poor's (S&P) ratings were not available, we have used ratings
  from Moody's Investor Service, Inc., Fitch Investor's Service, Inc. or ratings
  assigned by another nationally recognized statistical rating organization.

2 Includes common stocks and warrants, short-term investments, and other assets
  and liabilities.

yield bonds participated in that rally to some extent. Then, interest rates rose
in early 1996. The economy gained strength and investors grew concerned about
future inflation. The prices of fixed-income securities in general fell.
However, the prices of high yield bonds held their value better than other
fixed-income securities.

[LINE CHART]

High Yield Default Rate

0-5% 1985 1989 1995 1996 through 3/31

Source: Merrill Lynch & Co.

Plot Points
1.708 4.285 1.896 0.174

Q What caused high yield bonds to outperform other types of bonds?

A Higher yields and the potential for price appreciation attracted many
investors to the high yield bond market during the low interest rate
environment. This demand forced yields on high yield bonds to historically low
levels relative to U.S. Treasuries, a benchmark we look at in determining the
relative attractiveness of high yield bonds. Refinancings and takeovers in the
health care and broadcasting industries also were positive factors for high
yield bonds.

Q What is your economic outlook for the next six months?

A We share the view of Federal Reserve Board Chairman Alan Greenspan that the
economy will grow more slowly through the beginning of 1997 and that there will
be few inflationary pressures. That should provide a neutral environment for
high yield bonds. Slow growth and an aging economic cycle, however, puts
pressure on many high yield issuers. Default rates have been relatively low and
we would not be surprised to see them rise (see chart at the bottom of

<PAGE>

PAGE 5
- ------------------------------------

page four). Further, the peak time for a bond to default is three to five years
from issuance. Many new bonds came to market in the early 1990s after a period
of limited supply. We don't expect the default rate to soar, but the potential
for an increase in the default rate exists.

Q What other factors do you expect to effect the high yield bond market?

A We believe that some of the favorable trends currently in place in the high
yield market will continue. We think investors have begun to emphasize quality
over yield. This trend should continue in light of the recent volatility in the
stock and bond markets and the anticipated weaker economy. Because the portfolio
has had a relatively high concentration of higher quality bonds, we think this
should be positive for the Fund's holdings. We have continued to believe that
higher quality high yield bonds should provide greater investment value as we
move into a positive, but slow growth environment.

Q What are the benefits of investing in high yield bonds?

A High yield bonds offer long-term investors above average income and the
potential for capital appreciation. They provide a more generous stream of
income to compensate for the increased risk associated with investment in lower
quality bonds. We attempt to reduce risk through careful credit research and
analysis, and portfolio diversification. Careful diversification helps to reduce
the risk associated with individual holdings. Keystone's team of high yield
analysts meet with company managements and monitor portfolio holdings on an
ongoing basis. We will continue to seek bonds with generous yields at attractive
values that we believe provide the optimal balance of risk and reward given
current market conditions.

Top 5 Industries
as of July 31, 1996

                                                          Percentage
Industry                                                  of net assets
Cable/Other Video Distribution                               9.5 
Energy                                                       8.6 
Gaming                                                       8.4
Forest products/containers                                   5.6 
Wireless communications                                      5.4 

Q What factors influence the performance of high yield bonds the most?

A The cyclical movements of the economy, inflation, and interest rates are the
most significant influences on the performance of high yield bonds. By nature,
high yield bonds are less affected by the direction of interest rates than high
grade corporate and government bonds. Consequently, when interest rates declined
during 1995, high yield bonds appreciated to a lesser extent than high grade
bonds. Conversely, as interest rates rose in early 1996, high yield bonds were
affected less by price declines than many high grade bonds.

                                    [DIAMOND]

         This column is intended to answer questions about your Fund. If you
       have a question you would like answered, please write to:
                   Keystone Investment Distributors Company
                 Attn: Shareholder Communications, 22nd Floor
            200 Berkeley Street, Boston, Massachusetts 02116-5034.

<PAGE>

PAGE 6
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Keystone High Income Bond Fund (B-4)

Your Fund's Performance

[MOUNTAIN CHART]

Growth of an investment in
Keystone High Income Bond Fund (B-4)

0-$24

Reinvested Distributions  Initial Investment  Total Value: $17,207

7/86 7/88 7/90 7/92 7/94 7/96

PLOT POINTS
10000   10000
9480    10715
8552    10892
7896    11432
6213    10535
5186    10538
5866    13410
6349    16129
5792    16063
5470    16973
5074    17207

A $10,000 investment in Keystone High Income Bond Fund (B-4)
made on July 31, 1986 with all distributions reinvested was worth $17,207
on July 31, 1996. Past performance is no guarantee of future results.

Twelve-Month Performance as of July 31, 1996
- ---------------------------------------------------
Total return*                                 1.38%
Net asset value 7/31/95                      $4.42
                7/31/96                      $4.10
Dividends                                    $0.37
Capital gains                                 None

* Before deduction of contingent deferred sales charge (CDSC).

Historical Record as of July 31, 1996
- ---------------------------------------------------------------
                                       If you       If you did
Cumulative total return                redeemed     not redeem
1-year                                   -1.41%          1.38%
5-year                                   63.28%         63.28%
10-year                                  72.07%         72.07%
Average annual total return
1-year                                   -1.41%          1.38%
5-year                                   10.30%         10.30%
10-year                                   5.58%          5.58%

Top 10 Holdings
as of July 31, 1996

                                                              Percentage
Bonds                                                         of net assets 
Ampex (preferred stock)                                           2.5 
Iowa Select Farms                                                 1.4 
AK Steel                                                          1.0 
Teleport Communications Group                                     1.0 
Park Broadcasting                                                 1.0 
American Life                                                     1.0
Showboat                                                          1.0 
Conseco                                                           1.0 
Rexene                                                            0.9 
Schuller International                                            0.9 

The "If you redeemed" returns reflect the deduction of the 3% contingent
deferred sales charge (CDSC) for those investors who bought and sold Fund shares
after one calendar year. Investors who retained their fund investment earned the
returns reported in the second column of the table.

  The investment return and principal value will fluctuate so that your shares,
when redeemed, may be worth more or less than the original cost.

  You may exchange your shares for another Keystone fund by phone or in writing
for a $10 fee. The exchange fee is waived for individual investors who make an
exchange using Keystone's Automated Response Line (KARL). The Fund reserves the
right to change or terminate the exchange offer.

<PAGE>

PAGE 7
- -------------------------------------------

Growth of an Investment

[LINE CHART]

Comparison of change in value of a $10,000 investment in Keystone High Income
Bond Fund (B-4), the Lehman Aggregate Bond Index and the Consumer Price Index.

In Thousands                               July 31, 1986 through July 31, 1996

0-$30

Fund Average Annual Total Return
- --------------------------------
1 Year      5 Year      10 Year
- -1.41%      10.30%       5.58%

LABI $22,481    Fund $17,207    CPI $14,338

7/86 7/88 7/90 7/92 7/94 7/96

[PLOT POINTS]
7/86    10000   10000   10000
        10715   10411   10393
7/88    10892   11199   10822
        11432   12902   11361
7/90    10535   13812   11909
        10538   15286   12438
7/92    13410   17546   12831
        16129   19332   13187
7/94    16063   19348   13552
        16973   21304   13927
7/96    17207   22481   14338

[line] Fund       [line] Lehman Aggregate Bond Index (LABI)

[line] Consumer Price Index (CPI)

Past performance is no guarantee of future results. The one-year return reflects
the deduction of the Fund's 3% contingent deferred sales charge for shares held
for at least one year.

This chart graphically compares your Fund's total return performance to certain
investment indexes. It is the result of fund performance guidelines issued by
the Securities and Exchange Commission. The intent is to provide investors with
more information about their investment.

Components of the chart

The chart is composed of several lines that represent the accumulated value of
an initial $10,000 investment for the period indicated. The lines illustrate a
hypothetical investment in:

1. Keystone High Income Bond Fund (B-4)

The Fund seeks generous income primarily from high yield corporate bonds. Total
return quotations are stated after deducting sales charges (if applicable), fund
expenses and transaction costs, and assumes reinvestment of all distributions.

2. Lehman Aggregate Bond Index (LABI)

The LABI is a broad-based, unmanaged fixed-income index of U.S. government,
corporate and mortgage-backed securities. It represents the price change and
coupon income of several thousand securities of various credit qualities and
maturities. Securities are selected and compiled by Lehman Brothers, Inc.
according to criteria that may be unrelated to your Fund's investment objective.
It would be difficult for most individual investors to duplicate this index.

3. Consumer Price Index (CPI)

This index is a widely recognized measure of the cost of goods and services
produced in the U.S. The index contains factors such as prices of services,
housing, food, transportation and electricity which are compiled by the U.S.
Bureau of Labor Statistics. The CPI is generally considered a valuable benchmark
for investors who seek to outperform increases in the cost of living.

These indexes do not include transaction costs associated with buying and
selling securities, and do not hold cash to meet redemptions. It would be
difficult for most individual investors to duplicate these indexes.

Understanding what the chart means

The chart demonstrates your Fund's performance in relation to a well known
investment index and to increases in the cost of living. It is important to
understand what the chart shows and does not show.

This illustration is useful because it charts Fund and index performance over
the same time frame and over a long period. Long-term performance is a more
reliable and useful measure of performance than measurements of short-term
returns or temporary swings in the market. Your financial adviser can help you
evaluate fund performance in conjunction with the other important financial
considerations such as safety, stability and consistency.

<PAGE>

PAGE 8
- ------------------------------------
Keystone High Income Bond Fund (B-4)

Limitations of the chart

The chart, however, limits the evaluation of Fund performance in several ways.
Because the measurement is based on total returns over an extended period of
time, the comparison often favors those funds which emphasize capital
appreciation when the market is rising. Likewise, when the market is declining,
the comparison usually favors those funds which take less risk.

Performance can be distorted

Funds which are more conservative in their orientation and which place an
emphasis on capital preservation will tend to compare less favorably when the
market is rising. In addition, funds which have income as one of their
objectives also will tend to compare less favorably to relevant indexes.

Indexes may also reflect the performance of some securities which a fund may be
prohibited from buying. A bond fund, for example, may be limited to investments
in only high quality bonds, or a stock fund may only be able to buy stocks that
have been traded on a stock exchange for a minimum number of years or stocks
that have a certain market capitalization. Indexes usually do not have the same
investment restrictions as your Fund.

Indexes do not include the costs of investing

The comparison is further limited in its utility because the indexes do not take
into account any deductions for sales charges, transaction costs or other fund
expenses. Your Fund's performance figures do reflect such deductions. Sales
charges--whether up-front or deferred--pay for the cost of the investment advice
of your financial adviser. Transaction costs pay for the costs of buying and
selling securities for your Fund's portfolio. Fund expenses pay for the costs of
investment management and various shareholder services. None of these costs are
reflected in index total returns. The comparison is not completely realistic
because an index cannot be duplicated by an investor--even an unmanaged
index--without incurring some charges and expenses.

One of several measures

The chart is one of several tools you can use to understand your investment. It
should be read in conjunction with the Fund's prospectus, and annual and
semiannual reports. Also, your financial adviser, who understands your personal
financial situation, can best explain the features of your Keystone fund and how
it applies to your financial needs.

Future returns may be different

Shareholders also should be mindful that the long-run performance of either the
Fund or the indexes is not representative of what shareholders should expect to
receive from their Fund investment in the future; it is presented to illustrate
only past performance and is not a guarantee of future returns.

<PAGE>

PAGE 9
- --------------------------------------

SCHEDULE OF INVESTMENTS--July 31, 1996
<TABLE>
<CAPTION>
                                                                     Interest  Maturity      Par         Market
                                                                       Rate      Date       Value        Value
- ----------------------------------------------------------------------------------------------------------------
<S>                                         <C>                       <C>        <C>     <C>          <C>
FIXED INCOME (91.7%)                                               
INDUSTRIAL BONDS & NOTES (90.5%)                                   
AEROSPACE (4.5%)                                                   
 Airplane Pass Thru Trust                   Bond (Subord.)            10.875%    2019    $5,000,000   $ 5,200,000
 BE Aerospace, Incorporated                 Sr. Notes (Subord.)        9.875     2006     5,000,000     4,987,500
 CHC Helicopter Corporation                 Sr. Notes (Subord.)       11.500     2002     2,500,000     2,387,500
 Continental Airlines, Incorporated (c)     Sr. Equip. Trust Cert.    16.000     1999     1,075,275     1,075,275
 Greenwhich Air Services, Incorporated      Sr. Notes                 10.500     2006     5,000,000     5,025,000
 Moog, Incorporated (h)                     Sr. Notes (Subord.)       10.000     2006     3,500,000     3,526,250
 Sequa Corporation                          Sr. Notes                  8.750     2001     1,000,000       972,500
 UNC Inc. (h)                               Sr. Notes (Subord.)       11.000     2006     2,500,000     2,537,500
 Valujet, Incorporated (h)                  Sr. Notes                 10.250     2001     1,000,000       755,000
- -----------------------------------------------------------------------------------------------------------------
                                                                                                       26,466,525
- -----------------------------------------------------------------------------------------------------------------
BROADCASTING (5.0%)                                                
 Ackerly Communications, Incorporated       Sr. Notes                 10.750     2003     3,850,000     3,984,750
 EZ Communications, Incorporated            Sr. Notes (Subord.)        9.750     2005     3,000,000     2,955,000
 K-III Communications Corporation (h)       Sr. Notes                  8.500     2006     5,000,000     4,575,000
 Park Broadcasting, Incorporated (h)        Sr. Notes                 11.750     2004     5,000,000     5,750,000
 Paxson Communications Corporation          Sr. Notes (Subord.)       11.625     2002     5,000,000     5,200,000
 SFX Broadcasting, Incorporated (h)         Sr. Notes (Subord.)       10.750     2006     4,000,000     4,020,000
 Sinclair Broadcast Group, Incorporated     Sr. Notes (Subord.)       10.000     2005     3,000,000     2,947,500
- -----------------------------------------------------------------------------------------------------------------
                                                                                                       29,432,250
- -----------------------------------------------------------------------------------------------------------------
CABLE/OTHER VIDEO DISTRIBUTION (9.5%)                              
 Adelphia Communications Corporation        Sr. Notes                 12.500     2002     4,000,000     4,110,000
 Cablevision Systems Corporation            Sr. Notes (Subord.)       10.500     2016     5,500,000     5,280,000
 Charter Communications, South Eastern                             
  Capital Limited Partnership (h)           Sr. Notes                 11.250     2006     5,000,000     4,900,000
 Comcast Corporation                        Sr. Notes (Subord.)       10.625     2012     4,000,000     4,180,000
 Diamond Cable Communications Company                              
  (Eff. Yield 11.57%) (d)                   Sr. Disc. Notes            0.000     2004     7,000,000     5,040,000
 Fundy Cable Limited                        Sr. Notes                 11.000     2005     4,825,000     4,897,375
 Lenfest Communications, Incorporated       Sr. Notes                  8.375     2005     5,000,000     4,550,000
 Marcus Cable Operations Limited            Sr. Disc. Notes        
  Partnership (Eff. Yield 12.06%) (d)        (Subord.)                 0.000     2004     7,000,000     5,040,000
 People's Choice T.V. Corporation           Unit (Sr. Disc.        
  (Eff. Yield 12.47%) (d)                    Notes/Wts.)               0.000     2004     6,000,000     3,450,000
 Rogers Cablesystems Limited                Sr. Notes                 10.000     2005     5,000,000     4,975,000
 Videotron Group Limited                    Sr. Notes (Subord.)       10.250     2002     1,350,000     1,390,500
 Videotron Group Limited                    Deb.(Subord.) Voting Conv.10.625     2005     3,750,000     3,956,250
 Videotron Holdings PLC (Eff. Yield
  9.70%) (d)                                Sr. Disc. Notes            0.000     2005     7,000,000     4,567,500
- -----------------------------------------------------------------------------------------------------------------
                                                                                                       56,336,625
- -----------------------------------------------------------------------------------------------------------------

                                                                                         (continued on next page)
<PAGE>

PAGE 10
- -----------------------------------
Keystone High Income Bond Fund (B-4)

SCHEDULE OF INVESTMENTS--July 31, 1996

                                                                     Interest  Maturity      Par         Market
                                                                       Rate      Date       Value        Value
- -----------------------------------------------------------------------------------------------------------------
CHEMICALS (4.2%)                                                    
 G I Holdings, Incorporated                 Sr. Notes                 10.000%    2006    $4,816,000   $ 4,647,440
 Lanesborough Corporation                   Sr. Secd. Notes           10.000     2000     1,500,000     1,290,000
 Rexene Corporation                         Sr. Notes                 11.750     2004     5,000,000     5,462,500
 Scotts Company                             Sr. Notes (Subord.)        9.875     2004     3,000,000     3,075,000
 Sifto Canada, Incorporated                 Sr. Notes                  8.500     2000     3,000,000     2,910,000
 Texas Petrochemical Corporation (h)        Sr. Notes (Subord.)       11.125     2006     2,500,000     2,575,000
 Viridian, Incorporated                     Notes                      9.750     2003     5,000,000     5,137,500
- -----------------------------------------------------------------------------------------------------------------
                                                                                                       25,097,440
- -----------------------------------------------------------------------------------------------------------------
CONSUMER (3.0%)                                                     
 Dominion Textile USA                       Sr. Notes                  9.250     2006     4,075,000     3,962,935
 Exide Corporation                          Sr. Notes                 10.000     2005     5,000,000     4,900,000
 International Semi-Tech Electronics, 
  Incorporated (Eff. Yield 11.96%) (d)      Sr. Notes                  0.000     2003     8,000,000     4,520,000
 Revlon Worldwide Corporation                                       
  (Eff. Yield 13.00%) (d)                   Sr. Disc. Notes            0.000     1998     5,000,000     4,181,250
- -----------------------------------------------------------------------------------------------------------------
                                                                                                       17,564,185
- -----------------------------------------------------------------------------------------------------------------
DIVERSIFIED MEDIA (2.7%)                                            
 Affinity Group, Incorporated               Sr. Notes (Subord.)       11.500     2003     5,000,000     5,100,000
 American Media Operations,                                         
  Incorporated                              Sr. Notes (Subord.)       11.625     2004     2,000,000     2,030,000
 Lamar Advertising Company                  Sr. Secd. Notes           11.000     2003     4,000,000     4,160,000
 Viacom, Incorporated                       Deb. (Subord.)             8.000     2006     5,000,000     4,575,000
                                             Exchangeable
- -----------------------------------------------------------------------------------------------------------------
                                                                                                       15,865,000
- -----------------------------------------------------------------------------------------------------------------
ENERGY (8.6%)                                                       
 Clark USA, Incorporated                    Sr. Notes                 10.875     2005     5,000,000     5,037,500
 Cliffs Drilling (h)                        Sr. Notes                 10.250     2003     2,000,000     1,995,000
 Crown Central Petroleum Corporation        Sr. Notes                 10.875     2005     5,000,000     5,075,000
 Dual Drilling Company                      Sr. Notes (Subord.)        9.875     2004     4,550,000     4,777,500
 Falcon Drilling                            Sr. Notes                  8.875     2003     5,000,000     4,800,000
 Ferrellgas Partners Limited                                        
  Partnership (h)                           Sr. Notes                  9.375     2006     3,850,000     3,715,250
 Gerrity Oil & Gas Corporation              Sr. Notes (Subord.)       11.750     2004     2,400,000     2,544,000
 Gulf Canada Resources Limited              Sr. Notes (Subord.)        9.625     2005     5,175,000     5,213,813
 Mesa Operating Company                     Sr. Notes (Subord.)       10.625     2006     3,500,000     3,578,750
 Nuevo Energy Company                       Sr. Notes (Subord.)        9.500     2006     3,000,000     2,940,000
 Plains Resources, Incorporated (h)         Sr. Notes (Subord.)       10.250     2006     2,500,000     2,475,000
 Seagull Energy Corporation                 Sr. Notes (Subord.)        8.625     2005     1,000,000       960,000
 TransTexas Gas Corporation                 Sr. Notes                 11.500     2002     3,000,000     2,985,000
 Vintage Petroleum, Incorporated            Sr. Notes (Subord.)        9.000     2005     5,000,000     4,812,500
- -----------------------------------------------------------------------------------------------------------------
                                                                                                       50,909,313
- -----------------------------------------------------------------------------------------------------------------

<PAGE> 

PAGE 11
- --------------------------------------

SCHEDULE OF INVESTMENTS--July 31, 1996
                                                                
                                                                     Interest  Maturity      Par         Market
                                                                       Rate      Date       Value        Value
- -----------------------------------------------------------------------------------------------------------------
FINANCIAL (4.1%)                                                                    
 American Life Holding Company              Sr. Notes (Subord.)       11.250%    2004   $ 5,500,000   $ 5,747,500
 Chartwell Reinsurance Holdings                                     
  Corporation                               Sr. Notes                 10.250     2004     3,575,000     3,753,750
 Conseco, Incorporated                      Sr. Notes                 10.500     2004     5,000,000     5,685,000
 First Nationwide Parent Holdings           Sr. Notes                 12.500     2003     4,200,000     4,410,000
                                             (Exchangeable) 
 Reliance Group Holdings, Incorporated      Sr. Deb. (Subord.)         9.750     2003     5,000,000     4,950,000
- -----------------------------------------------------------------------------------------------------------------
                                                                                                       24,546,250
- -----------------------------------------------------------------------------------------------------------------
FOODS/TOBACCO/BEVERAGES (4.2%)                                      
 American Rice, Incorporated                Mtg. Notes                13.000     2002     2,550,000     2,346,000
 Chiquita Brands International,                                     
  Incorporated                              Sr. Notes                 10.250     2006     3,000,000     2,985,000
 Cott Corporation                           Sr. Notes                  9.375     2005     3,500,000     3,377,500
 Iowa Select Farms (Eff. Yield 15.26%)                              
  (8/02/94--$8,977,379) (c) (d) (f)         Sr. Disc. Notes            0.000     2004    15,000,000     8,328,000
 PM Holdings Corporation (Eff. Yield        Unit (Sr. Disc.         
  11.62%) (d)                                Notes/Wts.)               0.000     2005     1,812,000     1,001,130
 PMI Acquisition Corporation                Sr. Notes (Subord.)       12.250     2003     1,750,000     1,697,500
 TLC Beatrice International Holdings,                               
  Incorporated                              Sr. Notes                 11.500     2005     5,000,000     5,075,000
- -----------------------------------------------------------------------------------------------------------------
                                                                                                       24,810,130
- -----------------------------------------------------------------------------------------------------------------
FOREST PRODUCTS/CONTAINERS (5.6%)                                   
 Buckeye Cellulose Corporation              Sr. Notes (Subord.)        8.500     2005     5,000,000     4,762,500
 Calmar, Incorporated                       Sr. Notes (Subord.)       11.500     2005     4,000,000     3,890,000
 Container Corporation of America           Sr. Notes                 11.250     2004     2,500,000     2,600,000
 Four M Corporation (h)                     Sr. Notes                 12.000     2006     2,500,000     2,550,000
 Owens-Illinois, Incorporated               Sr. Deb.                  11.000     2003     5,000,000     5,387,500
 Packaging Resources, Incorporated (h)      Sr. Notes (Subord.)       11.625     2003     4,000,000     4,040,000
 Riverwood International Corporation        Sr. Notes                 10.250     2006     5,000,000     4,925,000
 Tembec Finance Corporation                 Sr. Notes                  9.875     2005     5,500,000     5,115,000
- -----------------------------------------------------------------------------------------------------------------
                                                                                                       33,270,000
- -----------------------------------------------------------------------------------------------------------------
GAMING (8.4%)                                                       
 California Hotel Finance Corporation       Liquid Real Estate Trust  11.000     2002     5,000,000     5,212,500
 Colorado Gaming and Entertainment                                  
  Company (f)                               Sr. Secd. PIK Notes       12.000     2003     4,778,393     4,443,905
 Grand Casinos, Incorporated                1st Mtg. Notes            10.125     2003     5,000,000     4,900,000
 Grand Palais Casino, Incorporated                                  
  (8/15/94--$7,750,000) (b) (c) (e)         Sr. Secd. PIK Notes       18.250     1997     8,571,123            86
 HMH Properties, Incorporated               Sr. Notes                  9.500     2005     5,000,000     4,800,000
 Livingwell, Incorporated (b) (c) (e)       Sr. Deb. (Subord.)        14.125     1996     2,200,000            22
 Livingwell, Incorporated (b) (c) (e)       Sr. Deb. (Subord.)        13.125     2001     2,000,000            20
 Prime Hospitality Corporation              1st Mtg. Notes             9.250     2006     5,000,000     4,868,750
 Resorts International Hotels               1st Mtg. Notes            11.000     2003     2,500,000     2,550,000
 Showboat, Incorporated                     Sr. Notes (Subord.)       13.000     2009     5,000,000     5,700,000
 Six Flags Theme Parks, Incorporated        Sr. Notes (Subord.)       12.250     2005     5,000,000     4,250,000

                                                                                         (continued on next page)
                                                                
<PAGE>

PAGE 12
- -----------------------------------
Keystone High Income Bond Fund (B-4)

SCHEDULE OF INVESTMENTS--July 31, 1996

                                                                   Interest  Maturity      Par         Market
                                                                     Rate      Date       Value        Value
 --------------------------------------------------------------------------------------------------------------
GAMING (continued)                                                
 Starcraft Corporation (b) (c) (e)          Notes (Subord.)         16.500%    1998    $6,925,000   $   138,500
 Station Casinos, Incorporated              Sr. Notes (Subord.)     10.125     2006     5,000,000     4,850,000
 Trump Atlantic City Associates             1st Mtg. Notes          11.250     2006     5,000,000     4,875,000
 Wyndham Hotel Corporation                  Sr. Notes (Subord.)     10.500     2006     3,500,000     3,508,750
- ---------------------------------------------------------------------------------------------------------------
                                                                                                     50,097,533
- ---------------------------------------------------------------------------------------------------------------
HEALTHCARE (3.6%)                                                 
 Dynacare, Incorporated                     Sr. Notes               10.750     2006     5,000,000     5,006,250
 Genesis Health                             Sr. Notes (Subord.)      9.750     2005     5,000,000     5,025,000
 Quorum Health Group, Incorporated          Sr. Notes (Subord.)      8.750     2005     2,500,000     2,437,500
 Regency Health Services, Incorporated      Sr. Notes (Subord.)      9.875     2002     5,000,000     4,850,000
 Universal Health Services,                                       
  Incorporated                              Sr. Notes                8.750     2005     4,000,000     3,900,000
- ---------------------------------------------------------------------------------------------------------------
                                                                                                     21,218,750
- ---------------------------------------------------------------------------------------------------------------
HOUSING (1.7%)                                                    
 Continental Homes Holding Corporation      Sr. Notes               10.000     2006     5,000,000     4,750,000
 Schuller International Group,                                    
  Incorporated                              Sr. Notes               10.875     2004     5,000,000     5,400,000
- ---------------------------------------------------------------------------------------------------------------
                                                                                                     10,150,000
- ---------------------------------------------------------------------------------------------------------------
MANUFACTURING (5.2%)                                              
 AAF McQuay, Incorporated                   Sr. Notes                8.875     2003     5,000,000     4,800,000
 Alpine Group, Incorporated                 Sr. Notes               12.250     2003     4,000,000     4,080,000
 Chatwins Group, Incorporated               Sr. Notes               13.000     2003     4,000,000     3,560,000
 Collins & Aikman Products Company          Sr. Notes (Subord.)     11.500     2006     5,000,000     5,112,500
 Hayes Wheels International,                                      
  Incorporated                              Sr. Notes (Subord.)     11.000     2006     2,500,000     2,543,750
 Key Plastics, Incorporated (c)             Sr. Notes               14.000     1999     3,500,000     3,517,500
 Koppers Industries, Incorporated           Sr. Notes                8.500     2004     3,000,000     2,857,500
 Mark IV Industries, Incorporated           Sr. Notes (Subord.)      7.750     2006     5,000,000     4,637,500
- ---------------------------------------------------------------------------------------------------------------
                                                                                                     31,108,750
- ---------------------------------------------------------------------------------------------------------------
METALS/MINERALS (4.6%)                                            
 AK Steel Corporation                       Sr. Notes               10.750     2004     5,750,000     6,224,375
 Bethlehem Steel Corporation                Sr. Notes               10.375     2003     5,000,000     5,200,000
 GS Technologies Operations,                                      
  Incorporated                              Sr. Notes               12.250     2005     4,000,000     4,110,000
 Jorgensen Earle                            Sr. Notes               10.750     2000     4,000,000     3,960,000
 WCI Steel, Incorporated                    Sr. Notes               10.500     2002     5,000,000     5,075,000
 Weirton Steel Corporation (h)              Sr. Notes               10.750     2005     3,000,000     2,812,500
- ---------------------------------------------------------------------------------------------------------------
                                                                                                     27,381,875
- ---------------------------------------------------------------------------------------------------------------
RETAIL (4.5%)                                                     
 Cole National Group, Incorporated          Sr. Notes               11.250     2001     3,500,000     3,675,000
 Finlay Enterprises (Eff. Yield 9.12%) (d)  Sr. Disc. Deb.           0.000     2005     2,000,000     1,595,000
 Finlay Fine Jewelry Corporation            Sr. Notes               10.625     2003     3,000,000     2,962,500

<PAGE>

PAGE 13
- --------------------------------------

SCHEDULE OF INVESTMENTS--July 31, 1996

                                                                     Interest  Maturity      Par         Market
                                                                       Rate      Date       Value        Value
- -----------------------------------------------------------------------------------------------------------------
RETAIL (continued)                                                  
 Hills Stores Company (h)                   Sr. Notes                 12.500%    2003    $3,500,000  $  3,150,000
 Michaels Stores, Incorporated              Sr. Notes                 10.875     2006     4,500,000     4,455,000
 Pamida, Incorporated                       Sr. Notes (Subord.)       11.750     2003     3,000,000     2,550,000
 Pantry, Incorporated                       Sr. Notes                 12.000     2000     3,500,000     3,150,000
 Service Merchandise Company                Sr. Deb. (Subord.)         9.000     2004     3,750,000     3,225,000
 Southland Corporation                      Sr. Deb. (Subord.)         5.000     2003     2,500,000     1,950,000
- -----------------------------------------------------------------------------------------------------------------
                                                                                                       26,712,500
- -----------------------------------------------------------------------------------------------------------------
TELECOMMUNICATIONS (3.3%)                                           
 Bell Cablemedia PLC (Eff. Yield                                    
  10.67%) (d)                               Sr. Disc. Notes            0.000     2005     6,675,000     4,138,500
 MFS Communication (Eff. Yield 8.49%)                               
  (d)                                       Sr. Disc. Notes            0.000     2004     7,000,000     5,250,000
 Teleport Communications Group              Sr. Notes                  9.875     2006     6,200,000     5,952,000
 Telewest PLC (Eff. Yield 9.86%) (d)        Sr. Disc. Deb.             0.000     2007     7,000,000     4,095,000
- -----------------------------------------------------------------------------------------------------------------
                                                                                                       19,435,500
- -----------------------------------------------------------------------------------------------------------------
TRANSPORTATION (2.4%)                                               
 Eletson Holdings, Incorporated             1st Pfd. Mtg. Notes        9.250     2003     3,000,000     2,865,000
 Gearbulk Holding Limited                   Sr. Notes                 11.250     2004     5,000,000     5,200,000
 Stena AB                                   Sr. Notes                 10.500     2005     5,000,000     4,962,500
 Teekay Shipping Corporation                1st Mtg. Notes             8.320     2008     1,500,000     1,410,000
- -----------------------------------------------------------------------------------------------------------------
                                                                                                       14,437,500
- -----------------------------------------------------------------------------------------------------------------
WIRELESS COMMUNICATIONS (5.4%)                                      
 Centennial Cellular Corporation            Sr. Notes                  8.875     2001     5,000,000     4,650,000
 Comcast Celluar Corporation                                        
  (Eff. Yield 13.42%) (d)                   Part. Disc. Notes          0.000     2000     7,000,000     4,777,500
 Mobile Telecommunication Technology        Sr. Notes (Subord.)       13.500     2002     4,500,000     4,747,500
 Pagemart Nationwide, Inc. (Eff. Yield      Unit (Sr. Disc.         
  10.80%) (d)                                Notes/Wts.)               0.000     2005     7,000,000     4,445,000
 Pricecellular Wireless Corporation                                 
  (Eff. Yield 10.64%) (d)                   Sr. Disc. Notes            0.000     2003     5,750,000     4,542,500
 Rogers Cantel                              Sr. Deb.                   9.375     2008     4,500,000     4,365,000
 Vanguard Celluar Systems,                                          
  Incorporated                              Deb.                       9.375     2006     5,000,000     4,825,000
- -----------------------------------------------------------------------------------------------------------------
                                                                                                       32,352,500
- -----------------------------------------------------------------------------------------------------------------
TOTAL INDUSTRIAL BONDS & NOTES (Cost--$560,951,237)                                                   537,192,626
- -----------------------------------------------------------------------------------------------------------------
FOREIGN BONDS (U.S. DOLLARS) (1.2%)                                 
 Intermedia Capital Partners (h)            Sr. Notes                 11.250     2006     3,000,000     3,007,500
 Yacimientos Petroliferos Fiscales                                  
  S.A. (YPF)                                Unsecd. Notes              8.000     2004     4,500,000     3,993,750
- -----------------------------------------------------------------------------------------------------------------
TOTAL FOREIGN BONDS (U.S. DOLLARS) (Cost--$7,056,779)                                                   7,001,250
- -----------------------------------------------------------------------------------------------------------------
TOTAL FIXED INCOME (Cost $568,008,016)                                                                544,193,876
- -----------------------------------------------------------------------------------------------------------------

                                                                                         (continued on next page)
</TABLE>

<PAGE>

PAGE 14
- ------------------------------------
Keystone High Income Bond Fund (B-4)

SCHEDULE OF INVESTMENTS--July 31, 1996
<TABLE>
<CAPTION>
                                                                                                   Market
                                                                                      Shares       Value
- --------------------------------------------------------------------------------------------------------------
<S>                                                                                    <C>         <C>
COMMON STOCKS/WARRANTS (1.4%)
Casino America, Incorporated (e)                                                         269,890   $ 1,838,626
Casino America, Incorporated, wts. (e)                                                    47,778        47,778
Chatwins Group, Incorporated, wts. (c) (e)                                                 9,500         9,500
CHC Helicopter Corporation, wts. (e)                                                      76,000        38,000
Colorado Gaming and Entertainment Company (e) (f)                                        477,839     1,552,977
Grand Palais Casinos, Incorporated, Series A, wts. (8/15/94--$2,507) (c) (e)             250,735           251
Grand Palais Casinos, Incorporated, Series B, wts. (8/15/94--$1,368) (c) (e)             136,765           137
Grand Palais Casinos, Incorporated, Series C, wts. (8/15/94--$12,080) (c) (e)          1,208,088         1,208
Grand Palais Casinos, Incorporated, Series D, wts. (8/15/94--$680,643) (c) (e)           680,643           681
Grand Palais Casinos, Incorporated, Ltd. Liab. Int. (8/15/94--$0) (c) (e)                931,379           931
Iowa Select Farm, wts. (2/04/94--$2,462,581) (c) (e) (f)                                 298,530       298,530
Lanesborough Corporation (c) (e)                                                           2,056            21
Nextel Communications Incorporated, wts. (e)                                               9,510            95
Pagemart, Inc., wts. (e) (h)                                                              83,030       498,180
PM Holdings Corporation (e)                                                                2,964             3
Specialty Equipment Cos., Incorporated (e)                                               351,900     3,694,950
Specialty Foods Acquisition Corporation (e)                                              131,250        65,625
- --------------------------------------------------------------------------------------------------------------
TOTAL COMMON STOCKS/WARRANTS (Cost--$9,108,637)                                                      8,047,493
- --------------------------------------------------------------------------------------------------------------
PREFERRED STOCK (2.5%)
Ampex Corp. (Cost--$23,987,332) (c) (e)                                                   24,562    15,004,312
- --------------------------------------------------------------------------------------------------------------

- --------------------------------------------------------------------------------------------------------------
MISCELLANEOUS INVESTMENT (0.0%)
Gold River Hotel and Casino
Corporation (Cost--$424,084) (c) (e)         Liquidating R.E. Trust                   10,775,000       107,750
- --------------------------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>
                                                              Interest   Maturity    Maturity
                                                                Rate       Date       Value
- --------------------------------------------------------------------------------------------------------------
<S>                                                             <C>      <C>        <C>          <C>
REPURCHASE AGREEMENT (1.2%)
Keystone Joint Repurchase Agreement (Investments
in repurchase agreements, in a joint trading
account, purchased 7/31/96) (Cost--$7,200,000)
(g)                                                             5.687%   08/01/96   $7,201,137      7,200,000
- --------------------------------------------------------------------------------------------------------------
TOTAL INVESTMENTS (Cost--$608,728,069) (a)                                                        574,553,431
- --------------------------------------------------------------------------------------------------------------
OTHER ASSETS AND LIABILITIES--NET (3.2%)                                                           19,127,315
- --------------------------------------------------------------------------------------------------------------
NET ASSETS (100.0%)                                                                              $593,680,746
- --------------------------------------------------------------------------------------------------------------
</TABLE>

<PAGE>

PAGE 15
- -------------------------------------------------------------------------------

(a) The cost of investments for federal income tax purposes amounted to
$612,891,254. Gross unrealized appreciation and depreciation of investments,
based on identified tax cost at July 31, 1996 are as follows:
<TABLE>
<CAPTION>
<S>                                               <C>
Gross unrealized appreciation                      $ 10,298,740
Gross unrealized depreciation                      $(48,636,563)
                                                  --------------
Net unrealized depreciation                        $(38,337,823)
                                                  ==============
</TABLE>
(b) Securities which have defaulted on payment of interest and/or principal. The
Fund has stopped accruing income on those so identified. At July 31, 1996, the
fair value of these securities was $138,628.

(c) All or a portion of these securities are either (1) restricted (i.e.,
securities which may not be publicly sold without registration under the Federal
Securities Act of 1933) or (2) illiquid securities, and are valued using market
quotations where readily available. In the absence of market quotations, the
securities are valued based upon their fair value determined under procedures
approved by the Board of Trustees. The Fund may make investments in an amount up
to 15% of the value of the Fund's net assets in such securities. The date of
acquisition and costs are set forth in parentheses after the title of each
restricted security. On the date of acquisition there were no market quotations
on similar securities and the above securities were valued at acquisition cost.
At July 31, 1996, the fair value of these restricted securities was $8,629,824.

(d) Effective yield (calculated at date of purchase) is the yield at which the
bond accretes on an annual basis until maturity date.

(e) Non-income-producing security.

(f) Affiliated issuers are those in which the Fund's holdings of an issuer
represents 5% or more of the outstanding voting securities of the issuer. The
Fund has never owned enough of the outstanding voting securities of any issuer
to have control (as defined in the Investment Company Act of 1940) of that
issuer. At July 31, 1996, the fair value of these securities was $14,623,412
(2.5% of the Fund's net assets).

(g) The repurchase agreements are fully collateralized by U.S. Government and/or
agency obligations based on market prices at July 31, 1996.

(h) Securities that may be resold to "qualified institutional buyers" under Rule
144A or securities offered pursuant to Section 4(2) of the Securities Act of
1933, as amended. These securities have been determined to be liquid under
guidelines established by the Board of Trustees.

See Notes to Financial Statements.

<PAGE>

PAGE 16
- ------------------------------------
Keystone High Income Bond Fund (B-4)

FINANCIAL HIGHLIGHTS
(For a share outstanding throughout each year)

<TABLE>
<CAPTION>
                                                         Year Ended July 31,
                                            1996          1995          1994           1993
- --------------------------------------------------------------------------------------------
<S>                                     <C>           <C>           <C>            <C>
Net asset value
 beginning of year                         $4.42         $4.68         $5.13          $4.74
- --------------------------------------------------------------------------------------------
Income from investment operations
Net investment income                       0.32          0.38          0.38           0.45
Net realized and unrealized gain
 (loss) on investments                     (0.27)        (0.15)        (0.38)          0.44
- --------------------------------------------------------------------------------------------
Total from investment operations            0.05          0.23             0           0.89
- --------------------------------------------------------------------------------------------
Less distributions from:
Net investment income                      (0.31)        (0.37)        (0.38)         (0.45)
In excess of net investment income         (0.06)        (0.02)        (0.07)         (0.05)
Tax basis return of capital                    0         (0.10)            0              0
Net realized gain on investments               0             0             0              0
- --------------------------------------------------------------------------------------------
Total distributions                        (0.37)        (0.49)        (0.45)         (0.50)
- --------------------------------------------------------------------------------------------
Net asset value end of year                $4.10         $4.42         $4.68          $5.13
- --------------------------------------------------------------------------------------------
Total return (a)                            1.38%         5.66%        (0.41%)        20.28%
Ratios/supplemental data
Ratios to average net assets:
 Total expenses                             1.94%(b)      2.03%         1.84%          2.06%
 Net investment income                      7.92%         8.64%         7.57%          9.30%
Portfolio turnover rate                      116%           82%          110%           125%
- --------------------------------------------------------------------------------------------
Net assets end of year (thousands)      $593,681      $764,965      $766,283       $972,164
- --------------------------------------------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>
                                          1992       1991       1990         1989         1988          1987
- ------------------------------------------------------------------------------------------------------------
<S>                                   <C>        <C>        <C>        <C>          <C>           <C>
Net asset value
beginning of year                        $4.19      $5.02      $6.38        $6.91        $7.66         $8.08
- ------------------------------------------------------------------------------------------------------------
Income from investment operations
Net investment income                     0.49       0.61       0.68         0.83         0.80          0.81
Net realized and unrealized gain
 (loss) on investments                    0.58      (0.72)     (1.18)       (0.51)       (0.71)        (0.26)
- ------------------------------------------------------------------------------------------------------------
Total from investment operations          1.07      (0.11)     (0.50)        0.32         0.09          0.55
- ------------------------------------------------------------------------------------------------------------
Less distributions from:
Net investment income                    (0.50)     (0.72)     (0.78)       (0.85)       (0.84)        (0.90)
In excess of net investment income       (0.02)         0      (0.08)           0            0             0
Tax basis return of capital                  0          0          0            0            0             0
Net realized gain on investments             0          0          0            0            0         (0.07)
- ------------------------------------------------------------------------------------------------------------
Total distributions                      (0.52)     (0.72)     (0.86)       (0.85)       (0.84)        (0.97)
- ------------------------------------------------------------------------------------------------------------
Net asset value end of year              $4.74      $4.19      $5.02        $6.38        $6.91         $7.66
- ------------------------------------------------------------------------------------------------------------
Total return (a)                         27.25%      0.03%     (7.84%)       4.95%        1.66%         7.15%
Ratios/supplemental data
Ratios to average net assets:
 Total expenses                           2.17%      2.34%      2.06%        1.97%        1.82%         1.65%
 Net investment income                   10.86%     14.64%     12.77%       12.36%       11.29%        10.26%
Portfolio turnover rate                     94%        78%        45%          75%          81%          135%
- ------------------------------------------------------------------------------------------------------------
Net assets end of year (thousands)    $841,757   $710,590   $820,940   $1,188,660   $1,274,673    $1,464,891
- ------------------------------------------------------------------------------------------------------------
</TABLE>
(a) Excluding applicable sales charges.

(b) The expense ratio includes indirectly paid expenses for the year ended July
    31, 1996. Excluding indirectly paid expenses, the expense ratio would have
    been 1.93%.

See Notes to Financial Statements.

<PAGE>

PAGE 17
- -----------------------------------

STATEMENT OF ASSETS AND LIABILITIES
July 31, 1996

<TABLE>
<CAPTION>
  Assets (Note 1)
<S>                                                         <C>
 Investments at market value:
  Unaffiliated issuers (identified cost--
  $588,842,978)                                             $  559,930,019
  Affiliated issuers (identified cost--$19,885,091)             14,623,412
- --------------------------------------------------------------------------
   Total investments                                           574,553,431
- --------------------------------------------------------------------------
 Cash                                                                  737
 Receivable for:
  Investments sold                                               9,582,742
  Interest                                                      12,625,275
  Fund shares sold                                                 343,102
 Prepaid expenses and other assets                               2,086,207
- --------------------------------------------------------------------------
   Total assets                                                599,191,494
- --------------------------------------------------------------------------
Liabilities (Notes 1, 2 and 5)
 Payable for:
  Investments purchased                                          2,989,677
  Fund shares redeemed                                             688,552
  Distributions to shareholders                                  1,700,454
 Due to related parties                                              2,000
 Other accrued expenses                                            130,065
- --------------------------------------------------------------------------
   Total liabilities                                             5,510,748
- --------------------------------------------------------------------------
Net assets                                                  $  593,680,746
==========================================================================
Net assets represented by (Note 1)
 Paid-in capital                                            $1,134,809,513
 Accumulated distributions in excess of net
  investment income                                             (1,700,454)
 Accumulated net realized loss on investments
  and foreign currency related transactions                   (505,253,675)
 Net unrealized depreciation on investments                    (34,174,638)
- --------------------------------------------------------------------------
   Total net assets                                         $  593,680,746
==========================================================================
Net Asset Value per share (Note 2)
    Net asset value of $593,680,746 / 144,797,055
    outstanding shares of beneficial interest                        $4.10
==========================================================================
</TABLE>

STATEMENT OF OPERATIONS
Year Ended July 31, 1996

<TABLE>
<CAPTION>
Investment income (Note 1)
<S>                                             <C>           <C>
 Interest:
  Unaffiliated issuers                                         $ 62,440,581
  Affiliated issuers                                              3,196,008
  Other income                                                      710,336
- ---------------------------------------------------------------------------
   Total income                                                  66,346,925
- ---------------------------------------------------------------------------
Expenses (Notes 4 and 5)
 Management fee                                 $ 3,788,171
 Transfer agent fees                              1,927,228
 Accounting, auditing and legal                      90,061
 Custodian fees                                     349,176
 Trustees' fees and expenses                         42,995
 Distribution Plan expenses                       6,747,276
 Miscellaneous expenses                             157,119
- ---------------------------------------------------------------------------
   Total expenses                                13,102,026
 Less: Expenses paid indirectly
  (Note 6)                                         (103,025)
- ---------------------------------------------------------------------------
  Net expenses                                                   12,999,001
- ---------------------------------------------------------------------------
 Net investment income                                           53,347,924
- ---------------------------------------------------------------------------
Net realized and unrealized
 loss on investments
 (Notes 1 and 3)
 Net realized gain on investments                                12,528,472
 Net change in unrealized depreciation
  on investments                                                (59,100,847)
- ---------------------------------------------------------------------------
 Net realized and unrealized loss on
  investments                                                   (46,572,375)
- ---------------------------------------------------------------------------
 Net increase in net assets resulting
  from operations                                              $  6,775,549
===========================================================================
</TABLE>
See Notes to Financial Statements.

<PAGE>

PAGE 18
- ------------------------------------
Keystone High Income Bond Fund (B-4)

STATEMENTS OF CHANGES IN NET ASSETS

<TABLE>
<CAPTION>
                                                                                 Year Ended July 31,
                                                                                1996            1995
 --------------------------------------------------------------------------------------------------------
<S>                                                                        <C>              <C>
Operations
Net investment income                                                      $  53,347,924    $  61,233,352
Net realized gain (loss) on investments and foreign currency related
 transactions                                                                 12,528,472      (91,818,044)
Net change in unrealized appreciation (depreciation) on investments          (59,100,847)      71,736,709
- ---------------------------------------------------------------------------------------------------------
  Net increase in net assets resulting from operations                         6,775,549       41,152,017
- ---------------------------------------------------------------------------------------------------------
Distributions to shareholders from (Note 1)
Net investment income                                                        (49,946,109)     (60,319,059)
In excess of net investment income                                            (9,344,299)      (3,043,529)
Tax basis return of capital                                                            0      (17,099,886)
- ---------------------------------------------------------------------------------------------------------
  Total distributions to shareholders                                        (59,290,408)     (80,462,474)
- ---------------------------------------------------------------------------------------------------------
Capital share transactions (Note 2)
Proceeds from shares sold                                                    162,907,187      233,171,940
Payments for shares redeemed                                                (315,113,110)    (240,425,711)
Net asset value of shares issued in reinvestment of dividends and
 distributions                                                                33,436,642       45,245,958
- ---------------------------------------------------------------------------------------------------------
  Net increase (decrease) in capital share transactions                     (118,769,281)      37,992,187
- ---------------------------------------------------------------------------------------------------------
  Total decrease in net assets                                              (171,284,140)      (1,318,270)
- ---------------------------------------------------------------------------------------------------------
Net assets
Beginning of year                                                            764,964,886      766,283,156
- ---------------------------------------------------------------------------------------------------------
End of year [including accumulated distributions in excess of net
 investment income as follows: 1996--($1,700,454) and 1995--
 ($5,828,773)] (Note 1)                                                    $ 593,680,746    $ 764,964,886
- ---------------------------------------------------------------------------------------------------------
</TABLE>
See Notes to Financial Statements.

<PAGE>

PAGE 19
- ----------------------------------

NOTES TO FINANCIAL STATEMENTS

(1.) Significant Accounting Policies

Keystone High Income Bond Fund (B-4) (the "Fund") is a common law trust for
which Keystone Management, Inc. ("KMI") is the Investment Manager and Keystone
Investment Management Company ("Keystone") is the Investment Adviser. Keystone
is a wholly-owned subsidiary of Keystone Investments, Inc. ("KII") and KMI is in
turn a wholly-owned subsidiary of Keystone. The Fund is registered under the
Investment Company Act of 1940, as amended (the "1940 Act"), as a diversified,
open-end investment company. The Fund's investment objective is to achieve the
highest possible income by investing in high yielding securities.

The following is a summary of significant accounting policies consistently
followed by the Fund in the preparation of its financial statements. The
policies are in conformity with generally accepted accounting principles, which
require management to make estimates and assumptions that affect amounts
reported herein. Although actual results could differ from these estimates, any
such differences are expected to be immaterial to the net assets of the Fund.

A. Valuation of Securities

Investments are usually valued at the closing sales price, or, in the absence of
sales and for over-the-counter securities, the mean of the bid and asked prices.
U.S. Government obligations held by the Fund are valued at the mean between the
over-the-counter bid and asked prices, as furnished by an independent pricing
service. Listed corporate bonds, other fixed income securities, mortgage and
other asset-backed securities, and other related securities are valued at prices
provided by an independent pricing service. In determining value for normal
institutional-size transactions, the pricing service uses methods based on
market transactions for comparable securities and various relationships between
securities that are generally recognized by institutional traders. Security
valuations not available from an independent pricing service (including
restricted securities) are valued at fair value as determined in good faith
according to procedures established by the Board of Trustees.

Short-term investments with remaining maturities of 60 days or less are carried
at amortized cost, which approximates market value. Short term securities with
greater than 60 days to maturity are valued at market value.

B. Repurchase Agreements

Pursuant to an exemptive order issued by the Securities and Exchange Commission,
the Fund, along with certain other Keystone funds, may transfer uninvested cash
balances into a joint trading account. These balances are invested in one or
more repurchase agreements that are fully collateralized by U.S. Treasury and/or
Federal Agency obligations.

Securities pledged as collateral for repurchase agreements are held by the
custodian on the Fund's behalf. The Fund monitors the adequacy of the collateral
daily and will require the seller to provide additional collateral in the event
the market value of the securities pledged falls below the carrying value of the
repurchase agreement.

C. Foreign Currency

The books and records of the Fund are maintained in United States (U.S.)
dollars. Foreign currency amounts are translated into United States dollars as
follows: market value of investments, assets and liabilities at the daily rate
of exchange; purchases and sales of investments, income and expenses at the rate
of exchange prevailing on the respective dates of such transactions. Net
unrealized foreign exchange gain (loss) resulting from changes in foreign
currency

<PAGE>

PAGE 20
- ------------------------------------
Keystone High Income Bond Fund (B-4)

exchange rates is a component of net unrealized appreciation (depreciation) on
investments and foreign currency transactions. Net realized foreign currency
gains and losses resulting from changes in exchange rates include foreign
currency gains and losses between trade date and settlement date on investment
securities transactions, foreign currency transactions and the difference
between the amounts of interest and dividends recorded on the books of the Fund
and the amount actually received. The portion of foreign currency gains and
losses related to fluctuations in exchange rates between the initial purchase
trade date and subsequent sale trade date is included in realized gain (loss) on
foreign currency transactions

D. Forward Foreign Currency Exchange Contracts

The Fund may enter into forward foreign currency exchange contracts ("forward
contracts") to settle portfolio purchases and sales of securities denominated in
a foreign currency and to hedge certain foreign currency assets. Forward
contracts are recorded at the forward rate and are marked-to-market daily.
Realized gains and losses arising from such transactions are included in net
realized gain (loss) on foreign currency related transactions. The Fund bears
the risk of an unfavorable change in the foreign currency exchange rate
underlying the forward contract and is subject to the credit risk that the other
party will not fulfill the obligations of the contract. Forward contracts
involve elements of market risk in excess of the amount reflected in the
statement of assets and liabilities.

E. Security Transactions and Investment Income

Securities transactions are accounted for no later than one business day after
the trade date. Realized gains and losses are computed on the identified cost
basis. Interest income is recorded on the accrual basis and includes
amortization of discounts and premiums. Dividend income is recorded on the
ex-dividend date.

F. Federal Income Taxes

The Fund has qualified and intends to qualify in the future as a regulated
investment company under the Internal Revenue Code of 1986, as amended (the
"Code"). Thus, the Fund is relieved of any federal income tax liability by
distributing all of its net taxable investment income and net taxable capital
gains, if any, to its shareholders. The Fund intends to avoid excise tax
liability by making the required distributions under the Code. Accordingly, no
provision for federal income tax is required.

G. Distributions

The Fund distributes net investment income monthly and net capital gains, if
any, annually. Distributions to shareholders are recorded at the close of
business on the ex-dividend date.

Income and capital gains distributions to shareholders are determined in
accordance with income tax regulations, which may differ from generally accepted
accounting principles. These differences are primarily due to the expiration of
capital loss carryovers.

(2.) Capital Share Transactions

The Fund's Declaration of Trust authorizes the issuance of an unlimited
number of shares of beneficial interest with a par value of $1.00.
Transactions in shares of the Fund were as follows:
<TABLE>
<CAPTION>
                                                 Year Ended July 31,
                                                1996            1995
- ------------------------------------------------------------------------
<S>                                          <C>            <C>
Shares sold                                   38,767,387     53,793,683
Shares redeemed                              (74,982,398)   (55,102,608)
Shares issued in reinvestment of
dividends and distributions                    7,959,753     10,479,964
- ------------------------------------------------------------------------
Net increase (decrease)                      (28,255,258)     9,171,039
- ------------------------------------------------------------------------
</TABLE>

<PAGE>

PAGE 21
- -----------------------------

(3.) Securities Transactions

Cost of purchases and proceeds from sales of investment securities (excluding
short-term securities) for the year ended July 31, 1996 were $741,296,676 and
$879,000,971, respectively.

  As of July 31, 1996, the Fund has a capital loss carryover for federal income
tax purposes of approximately $501,090,000 which expires as follows:
$43,981,000--1997, $93,048,000--1998, $91,149,000--1999, $122,350,000--2000,
$44,605,000--2002 and $105,957,000--2003.

(4.) Distribution Plan

The Fund bears some of the costs of selling its shares under a Distribution Plan
(the "Plan") adopted pursuant to Rule 12b-1 under the 1940 Act. Under the Plan,
the Fund pays its principal underwriter, Keystone Investment Distributors
Company ("KIDC"), a wholly-owned subsidiary of Keystone, amounts which are
calculated and paid daily.

  Under the Plan, the Fund pays a distribution fee which may not exceed 1.00% of
the Fund's average daily net assets, of which 0.75% is used to pay distribution
expenses and 0.25% may be used to pay service fees.

  During the year ended July 31, 1996, the Fund paid expenses under the Plan of
$6,747,276.

  Contingent deferred sales charges paid by redeeming shareholders may be paid
to KIDC.

  The Plan may be terminated at any time by vote of the Independent Trustees or
by vote of a majority of the outstanding voting shares of the Fund. However,
after the termination of the Plan, at the discretion of the Board of Trustees,
payments to KIDC may continue as compensation for its services which had been
earned while the Plan was in effect.

  KIDC intends, but is not obligated, to continue to pay distribution costs that
exceed the current annual payments from the Fund. KIDC intends to seek full
payment of such distribution costs from the Fund at such time in the future as,
and to the extent that, payment thereof by the Fund would be within permitted
limits.

  Total unpaid distribution costs at July 31, 1996 amounted to $5,597,863.

(5.) Investment Management Agreement and Other Affiliated Transactions

Under the terms of the Investment Management Agreement between KMI and the Fund,
KMI provides investment management and administrative services to the Fund. In
return, KMI is paid a management fee, computed and paid daily, at an annual rate
of 2.00% of the Fund's gross investment income plus an amount determined by
applying percentage rates starting at 0.50% and declining as net assets increase
to 0.25% per annum, to the net asset value of the Fund.

  KMI has entered into an Investment Advisory Agreement with Keystone under
which Keystone provides investment advisory and management services to the Fund.
In return for its services, Keystone receives an annual fee representing 85% of
the management fee received by KMI.

  During the year ended July 31, 1996, the Fund paid or accrued $18,334 to
Keystone for certain accounting services. The Fund paid or accrued $1,927,228 to
Keystone Investor Resource Center, Inc., a wholly-owned subsidiary of Keystone,
for services rendered as the Fund's transfer and dividend disbursing agent.

  Certain officers and/or Directors of Keystone are also officers and/or
Trustees of the Fund. Officers of Keystone and affiliated Trustees receive no
compensation directly from the Fund.

(6.) Expense Offset Arrangement

The Fund has entered into an expense offset arrangement with its custodian.
For the year ended July 31, 1996, the

<PAGE>

PAGE 22
- ------------------------------------
Keystone High Income Bond Fund (B-4)

Fund incurred total custody fees of $349,176 and received a credit of $103,025
pursuant to this expense offset arrangement, resulting in a net custody expense
of $246,151. The assets deposited with the custodian under this expense offset
arrangement could have been invested in income-producing assets.

(7.) Subsequent Distribution to Shareholders

A distribution from net investment income of $0.028 per share was declared
payable on September 6, 1996 to shareholders of record on August 23, 1996. This
distribution is not reflected in the accompanying financial statements.

(8.) Subsequent Event

On September 6, 1996, Keystone Investments Inc. entered into an Agreement and
Plan of Acquisition and Merger (the "Acquisition") with First Union Corporation
and First Union National Bank of North Carolina ("First Union") whereby First
Union would acquire all the assets and liabilities of Keystone Investments, Inc.
Subject to the receipt of the required regulatory and shareholder approvals, the
Acquisition is expected to take place in late December 1996.

- -------------------------------------------------------------------------------
FEDERAL TAX STATUS--FISCAL 1996 DISTRIBUTIONS
(Unaudited)

  During the year ended July 31, 1996, distributions of $0.37 were paid in
shares or cash.

  In January 1997 complete information on calendar year 1996 distributions will
be forwarded to you to assist in completing your 1996 federal income tax return.

<PAGE>

PAGE 23
- -----------------------------------

INDEPENDENT AUDITORS' REPORT

The Trustees and Shareholders
Keystone High Income Bond Fund (B-4)

We have audited the accompanying statement of assets and liabilities of Keystone
High Income Bond Fund (B-4), including the schedule of investments, as of July
31, 1996, and the related statement of operations for the year then ended, the
statements of changes in net assets for each of the years in the two-year period
then ended, and the financial highlights for each of the years in the ten-year
period then ended. These financial statements and financial highlights are the
responsibility of the Fund's management. Our responsibility is to express an
opinion on these financial statements and financial highlights based on our
audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements and financial
highlights are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of securities owned as of July
31, 1996 by correspondence with the custodian and brokers. An audit also
includes assessing the accounting principles used and significant estimates made
by management, as well as evaluating the overall financial statement
presentation. We believe that our audits provide a reasonable basis for our
opinion.

In our opinion, the financial statements and financial highlights referred to
above present fairly, in all material respects, the financial position of
Keystone High Income Bond Fund (B-4) as of July 31, 1996, the results of its
operations for the year then ended, the changes in its net assets for each of
the years in the two-year period then ended, and the financial highlights for
each of the years in the ten-year period then ended in conformity with generally
accepted accounting principles.

                                                         KPMG Peat Marwick LLP

Boston, Massachusetts
September 6, 1996

<PAGE>

[BACK COVER]

                         -------------------------------
                                    KEYSTONE
                                 FAMILY OF FUNDS


                                    [DIAMOND]

                               Balanced Fund (K-1)
                           Diversified Bond Fund (B-2)
                          Growth and Income Fund (S-1)
                           High Income Bond Fund (B-4)
                             International Fund Inc.
                                  Liquid Trust
                            Mid-Cap Growth Fund (S-3)
                         Precious Metals Holdings, Inc.
                             Quality Bond Fund (B-1)
                         Small Company Growth Fund (S-4)
                           Strategic Growth Fund (K-2)
                                  Tax Free Fund
                         -------------------------------


This report was prepared primarily for the information of the Fund's
shareholders. It is authorized for distribution if preceded or accompanied by
the Fund's current prospectus. The prospectus contains important information
about the Fund including fees and expenses. Read it carefully before you invest
or send money. For a free prospectus on other Keystone funds, contact your
financial adviser or call Keystone.



[KEYSTONE LOGO]       KEYSTONE
                      INVESTMENTS

                      P.O. Box 2121
                      Boston, Massachusetts 02106-2121




B4-R-9/96
47M                                                [RECYCLE LOGO]



                         -------------------------------

                                 K E Y S T O N E



                             [GRAPHIC OF MOUNTAINS]




                                   HIGH INCOME
                                BOND FUND (B-4)

                         -------------------------------


                                 [KEYSTONE LOGO]

                                  ANNUAL REPORT
                                  JULY 31, 1996




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